sveltekit-smelte-setup

1. Setup SvelteKit: kit.svelte.dev/docs (c2916672)
2. Add Tailwind CSS: github.com/svelte-add/tailwindcss (513a04b9)
3. Add Smelte (5ce55eb4)
   1. change tailwind.config.cjs
   2. import 'smelte/src/tailwind.css' in root __layout.svelte.